August 2010
In a simplified description of our August articles, you could say that they are concerned with finding the fault and seeking out the culprit! A bit like our politics, if you ask me! However, the next stage is more important - that is identifying the correct solution in the particular circumstance! Therein lies the challenge...
Thank you for your interest in Electricity+Control. We welcome your comments, suggestions and your articles.
Wendy Izgorsek
Editor
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Continuous monitoring of Profibus networks By D Derckson, LappKabel Ninety percent of faults on the Profibus network are caused during installation or maintenance. This article promotes an online diagnostic tool which continually monitors the communication on the Profibus network - tracing intermittent faults which are the most difficult to find. Detection is key: Harmonic detection methods for active power filter applications - Part 2 By L Asiminoaei, F Blaabjerg, S Hansen, Danfoss Part 1 of this article (published in Electricity+Control in July 2010), stated that all Harmonic detection methods are based on different types of filters. Part 2 presents different Harmonic detection methods for Active Harmonic Filters and investigates detection methods with a simulation set-up that allows fair comparisons of their filtering performance. Master Follower VSD application - overland conveyor belts By C Watkins, Zest Long overland conveyor systems pose challenges regarding the electrical and mechanical drive systems. A VSD system provides the flexibility to control the speed of the conveyor belt which allows for greater process control as well as saving energy. On site power in an African environment: shifting from engines to engineering - always on, always available By W de Villiers, Barloworld Power Many opportunities exist for on site power solutions. These solutions all have their own pros and cons which must be considered when selecting the correct solution for the required application. Temperature - precisely that! Practical considerations for temperature measurement in industry By N Liddle, Unitemp This article highlights practical considerations to guide the effective measurement of temperature and emphasises that, by carefully selecting your sensor type and adopting appropriate measuring techniques, precise data can be achieved and utilised to optimise the process. Importance of switchgear and power distribution to mission success in critical power systems: Part 2 By IF Bitterlin, Prism Power Part 1 of this article was published in the June 2010 edition of Electricity+Control. Part 2 covers common points of failure and suggests that the designer's ‘art' is to minimise their number and impact. FTS calibration for environmental monitoring By L Rende, Fluke This article describes the hardware and set-up and other recommendations for testing the orifice flow meters used for verification and calibration of flows into PM2.5 particulate monitoring instruments.
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